<button ng-if="item.{name}" class="btn btn-primary" type="button">
<i onclick="$(this).toggleClass('fa-play fa-stop');play_audio($(this).next())" class="fa fa-play"></i>
<audio style="display:none;" ng-src="{{tomedia(item.{name})}}" loop="loop"></audio>
</button>
<span ng-if="!item.{name}">无</span>